Chem 120, Summer Quarter 2012
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Page 1 of 2
Quiz Section No.:
EXPERIMENT 4 – CLASSES OF CHEMICAL REACTIONS PRE‐LAB EXERCISE Make sure to report ALL numbers with correct units and the proper number of significant figures indicated. 1. Write the balanced chemical equation for each of the following. Include phase labels
on all species.
a. Solid iron(III) oxide is formed from its elements at room temperature.
b. Solid iron(III) oxide reacts with carbon graphite to form solid iron metal and
gaseous carbon monoxide.
c. Solid copper(II) chloride and liquid water form when solid copper(II) oxide is
dissolved in liquid hydrogen chloride.
d. When reacted with elemental chlorine at room temperature, liquid phosphorus
trichloride is converted to solid phosphorus pentachloride.
Chem 120, Summer Quarter 2012
Page 2 of 2
Name:
Quiz Section No.:
2. In the following, only one of two total products is named. Determine the other
product of these reactions and write the balanced chemical equation. Include phases.
a. Solid magnesium reacts with aqueous lead(II) bromide to form solid lead
metal and an aqueous substance.
b. When aqueous solutions of potassium bromide and sulfuric acid (H2SO4) are
combined, aqueous hydrogen bromide and another aqueous substance are
formed.
3. By referring to the table below of the activity series of common metals, indicate
whether each one of the following metals will be able to displace the H atom from
HCl (aq) as H2 gas. Symbol Sample
Activity
K
Pt yes no Pb yes no K yes no Au yes no Potassium Most Active
Na
Sodium
Ca
Calcium
Mg
Magnesium
Al
Aluminum
Zn
Zinc
Fe
Iron
Pb
Lead
H2
Hydrogen
Cu
Copper
Hg
Mercury
Ag
Silver
Pt
Platinum
Au
Gold
Least active